As an ophthalmologist, I enjoyed reading your column on “optics” this week. I also enjoyed reading your recent bit on our cultural aversion to correct spelling. So I feel obliged to mention the missing “h” in your rendition of “ophthalmology”. You’re certainly not alone, though. Googling the uncorrected version will reveal nearly 6 million hits – many from fellow ophthalmologists. To get around the entire issue, we often just refer to ourselves as “eye guys”.